Reliability Analysis of Transformer Considering Current Variation
Subject Areas : Engineering
ALIREZA ALESAADI
1
,
REZA GHAFURI
2
,
Mohammad Mehdi Ghanbarian
3
1 - Department of Electrical and Computer Engineering, Kzeroun Branch, Islamic Azad University, Kzeroun, Iran
2 - Department of Electrical and Computer Engineering, Kzeroun Branch, Islamic Azad University, Kzeroun, Iran
3 - MSc/Islamic Azad University, Kazeroon Branch
Keywords: : transformer, failure rate, reliability, barrage-type tidal plant, current-type tidal plant, wind plant.,
Abstract :
The power transformer is used as one of the important equipment of this system to change the voltage level. The price of this equipment is high and in case of breakdown and interruption of electric power, a lot of damage is done to the network. In this paper, the reliability of power transformers is investigated and the effect of changes in the current passing through the coils on the reliability of these equipment is studied. The effect of current change in power transformers is more important for power plants whose electric current has many changes. In recent years, power plants based on renewable energy sources have been built and these power plants have variable production capacity due to changing weather conditions. For example, in wind power plants due to the change in wind speed, in tidal power plants due to the change in tidal height, and in current-type tidal power plants due to the change in the speed of tidal currents, the production power of the power plant varies and therefore with the change in power production of the power plant, the electric current is also variable and the failure rate of the transformer will also change, which must be checked. Based on this, in this paper, by extracting the relationships related to the dependence of the production power of wind power plants on wind speed, reservoir-type tidal power plants on tidal height, and tidal current power plants on the speed of tidal currents, the failure rate of transformers used in these power plants is studied. To show how the failure rate of the transformer changes, the simulation is done in the MATLAB software environment.
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